Wireless just seems like a PITA with batteries and possible latency issues, etc... I prefer my wired headphones (Audio Technica ATH-M50) with a 10 foot straight cord. They work amazingly and I just drape the cord over the back of my left shoulder. Never gets in the way of my playing.

The pro's just use a really expensive wireless headset transmitter with their favorite in ear monitors. They usually have their techs figure out what mix of each member's instrument comes through the most (per person) and they don't have any latency issues.

If you are running everything through your computer, it could be a soundcard issue. If you are playing everything through your amp, then eliminate that variable and see if you have less latency. I cant see the amp causing the issues, but its just another variable in the mix.

In the end, you are best off playing music either from a USB that you plug in to the TD-11, or plug the computer headphone jack to the mix in on the TD-11 and run wired headphones directly from the TD-11.